CVE-2024-26844

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

17/04/2024

Last modified:

02/04/2025

Description

In the Linux kernel, the following vulnerability has been resolved: block: Fix WARNING in _copy_from_iter Syzkaller reports a warning in _copy_from_iter because an iov_iter is supposedly used in the wrong direction. The reason is that syzcaller managed to generate a request with a transfer direction of SG_DXFER_TO_FROM_DEV. This instructs the kernel to copy user buffers into the kernel, read into the copied buffers and then copy the data back to user space. Thus the iovec is used in both directions. Detect this situation in the block layer and construct a new iterator with the correct direction for the copy-in.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::		6.1.80 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.19 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.7.7 (excluding)
cpe:2.3:o:linux:linux_kernel:6.8:rc1::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2024-26844

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools